Port Elizabeth - The Proteas's David Miller scored his first century in the one-day international against the West Indies being played at St George's Park on Sunday.
Miller notched up 130 not out and the Proteas 262 for eight in their 50 overs.
The West Indies won the toss and decided to bowl on Sunday morning.
With the series secured after they won the first three matches, South Africa rested leading run-scorer Hashim Amla and fast bowlers Dale Steyn and Vernon Philander, while captain AB de Villiers played as a batsman only, handing the wicketkeeping gloves to Morne van Wyk.
Wayne Parnell and Kyle Abbott replaced the two fast bowlers while left-arm spinner Aaron Phangiso played in place of leg-spinner Imran Tahir.
The Windies rested fast bowler Jerome Taylor while Narsingh Deonarine (neck) and Suleiman Benn (back) were ruled out.
Sheldon Cottrell, Leon Johnson and Darren Sammy came in to the side.
The scoreboard as supplied by AP:
South Africa
Rilee Rossouw c Sammy b Cottrell 4
Faf du Plessis c Ramdin b Holder 4
AB de Villiers c Ramdin b Russell 19
David Miller not out 130
JP Duminy c & b Sammy 43
Farhaan Behardien b Holder 12
Wayne Parnell b Holder 12
Aaron Phangiso c Johnson b Holder 0
Kyle Abbott not out 1
Extras: (2lb, 17w) 19
TOTAL: (for 8 wickets) 262
Overs: 50.
Fall of wickets: 1-18, 2-32, 3-32, 4-76, 5-166, 6-196, 7-259, 8-259.
Did not bat: Morne Morkel.
Bowling: Sheldon Cottrell 6-0-39-2, Jason Holder 10-1-53-4, Andre Russell 10-1-60-1, Darren Sammy 10-1-46-1, Carlos Brathwaite 10-1-39-0, Marlon Samuels 3-0-19-0, Chris Gayle 1-0-4-0.
Toss: won by West Indies.
Umpires: Steve Davis, Australia, and Shaun George, South Africa.
TV Umpire: S Ravi, India. Match Referee: Chris Broad, England.